drakecai
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How can I change Graphite (carbon) to CO2?
How can I change Graphite (carbon) to CO2?
I think it has something to deal with heat?
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metalresearcher
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Just burn it.
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hissingnoise
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Strong HNO3 will oxidise your graphite (slowly) without the application of heat . . .
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drakecai
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How slow?
And also is there anyway I can separate graphite from sand?
Also the heat, how much F would it need to be?
[Edited on 19-10-2010 by drakecai]
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madscientist
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Thread Moved
19-10-2010 at 16:19 |
12AX7
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Flotation seperation will do a wonderful job. Or you can roast the sand along with it.
You're looking at orange-hot temperatures (~1600F / 900C).
Tim
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Sedit
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I have to ask, is this a homework question?
Knowledge is useless to useless people...
"I see a lot of patterns in our behavior as a nation that parallel a lot of other historical processes. The fall of Rome, the fall of Germany — the
fall of the ruling country, the people who think they can do whatever they want without anybody else's consent. I've seen this story
before."~Maynard James Keenan
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drakecai
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yup
My teacher told me today that its not with heat. So how else can i separate them?
He told me that i should be using something to separate the two.
For Ex: If i had tiny particles of tin and sand I would use a magnet to separate the two.
[Edited on 20-10-2010 by drakecai]
[Edited on 20-10-2010 by drakecai]
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Justin
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i don't think tin is ferromagnetic, IIRC iron, cobalt and nickel are ferromagnetic.
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madscientist
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Start by looking at a list of physical properties for the two. Where do graphite and sand differ? That will give you a starting point.
I weep at the sight of flaming acetic anhydride.
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Mr. Wizard
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The particles of tin could be separated by panning, as you pan for gold. The velocity of moving water preferentially moves the less dense silica. I'm
assuming they are really tin, not plated steel we often erroneously call tin. Conducting metal can be removed from non conducting metal by putting it
in a strong AC field. This causes current to flow in the metal, which push it away from the original AC field. The shape of the metal has a lot to do
with how well the eddy current is induced. Graphite may even work in this kind of set up.
Sand graphite and most metals have a different density, possibly a liquid could be used to 'float' one on them and not the other? Air bubbles stick
to some materials better than others causing them to float. This is used to separate many metal ores. Silica has a density of 2.634 while graphite has
less at about 2.09 to 2.23 Perhaps some sort of chlorinated liquid would be dense enough to float the graphite?
If the grains are sifted to a uniform size, a flow of air would separate them, with the less dense graphite being carried away and collected in a
filter or screen.
Depending on the type of graphite it may even levitate above a tilted very strong magnet platform, interspersed with gaps to allow the sand to fall
through.
The original question can be solved just by heating the sand in a tin can in a BBQ full of burning charcoal, and pumping a small amount of air into
the red hot sand with an aquarium pump through a steel tube in the bottom of the sand. Any kind of pressure source could be used, from a balloon to
an old car tire with a loosened Schrader valve.
[Edited on 20-10-2010 by Mr. Wizard]
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